Air-vent.



A. L. GADSBY.

AIR VENT.

APPLICATION FILED APR. 10, 1914.

1 1 3%%%% Patented Apr. 13, 1915.

INVENTOR:

THE NORRIS PETERS 60., PHOTO-LITHQ, WASHINGTONv D. c.

TTFITTFM @TATFF TATFFTT UFFTF.

ALVIN LEAIVION GADSBY, OF TORONTO, ONTARIO, CANADA.

AIR-VENT.

maniac.

Application filed April 10, 1914.

To all whomit may concern:

Be it known that I, ALVIN. LEAMON GADSBY, a subject of the King of Great Britain, residing at Toronto, in the county of York, in the Province of Ontario, Dominion of Canada, have invented new and useful Improvements in Air-Vents, of which the following is a specification.

My invention relates to an air vent for the particular arrangement and combination of parts hereinafter described.

In the accompanying drawing: Figure 1 is a side elevation of the inlet pipe of an explosion motor having my improved vent device applied thereto. Fig. 2 is a Sectional view taken on the line aa of Fig. 1, certain parts in front of the line of section being shown dotted. Fig. 3 is a detail sectional view on the line 71-42 of Fig. 2. Fig. 4: is a diagrammatic view showing my invention as applied to an automobile engine and showing means for operating the vent. Fig. 5 shows in detail the bell-crank lever for operating the device.

Throughout the separate views the same part is designated by the same reference character.

Referring more particularly to the drawing, 1 is an intake pipe for an explosion motor and 2 is my improved vent device. The device 2 as shown, comprises a solid block such as 3, one face of which is shaped to conform to the outer surface of the pipe to which it is to be attached, and on one side of the block 3 I provide lugs such as 4 which carry a bolt or rivet such as 5 to which is secured one end of a strap such as 6, the other end of the strap having attached thereto a threaded bolt such as 7 which may be placed in a slot between the lugs 8. When the parts have been placed in the position shown, the device 2 may be clamped securely to the pipe by tightening the winged nut 9 on the bolt 7 The block 3 is slotted as indicated at 10 to receive a valve plate 11 which is pivotally Specification of Letters Patent.

Patented Apr. 13, 1915.

Serial No. 831,095.

mounted on a bolt such as 12 at the upper end of the block 3, and the plate 11 is of such shape that it normally hangs directly beneath the bolt 12 so as to cover an air passage 13 which is drilled perpendicularly to the plane of movement of the valve plate 11 and which connects the interior of pipe 1 with the outer air whenever the plate 11 is drawn into the position shown in dotted lines in Fig. 2.

In order to secure the quick return of the plate 11 to the cut off position I provide a spring 14 one end of which is connected to the block 3 by having its end 15 inserted into the drill hole 16, the body of the spring being disposed within a recess 17 in the block 3. The opposite end 18 of the spring is attached to the plate 11 by being inserted into a drill hole 19. The normal closed position of the valve plate is determined by a pin such as 20.

To operate the plate 11 to open the aperture 13, I have provided a lever arm 21 in tegral with the plate 11 and extending up wardly therefrom. Connected to the lever 21 is a cord or chain 22 which may extend to operating mechanism on the floor board or other suitable position, but which I have shown mounted on the floor board. This operating mechanism comprises a pivoted bell lever 23 which may be moved upwardly in the direction of the arrow by the drivers foot, and when this is done the connection 22 is tightened and the plate 11 swung into the position shown in Fig. 2 whereby additional air is admitted to the pipe 1. Upon release of lever 23 the spring 14 immediately swings the plate into position to entirely close the opening 13.

It will be understood that while I have shown and described the preferred form of my invention, I contemplate such modifications as are mechanically equivalent to the form shown and described herein.

Having thus described my invention, what I claim is 1. An apparatus for controlling an air inlet, comprising in combination, a substantially solid block having an inlet therethrough and slotted substantially at right angles to said inlet, a valve plate pivotally mounted in said block and working in said slot, and a spring having one end secured to the said solid block and the other end secured to said valve plate and adapted to normally retain said valve plate in the closed position and, press the same against the solid block whereby a tight joint therebetWeen is obtained.

2. An apparatus for controlling an air inlet, comprising in combination, a substantially solid block having an inlet therethrough and slotted substantially at right angles to said inlet, said block also being provided With a recess, a valve plate pivotally mounted in said block and Working insaid slot, a spring disposed in said recess and having one end secured to the said block and the other to said valve plate to keep said plate normally in position over said inlet and serving to maintain a tight joint between said valve plate and block, and means for detachably securing said block in position.

In testimony whereof I aflix my signature in the presence of two Witnesses.

ALVIN LEAMON GADSBY. Witnesses D. S. TovELL, H. P. HARWOOD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

' Washington, D. 0. 

